The V-Twin Motorcycle Performance
is your source of information to build, tune and
maintain high performance Harley-Davidson street and racing motorcycles.
You will find the information needed for tuning, modification, preparation and maintenance
for your Harley-Davidson motorcycle engine. Whether you are a new rider looking for
step-by-step instructions to modify a CV carburetor, installing a new cam, want to find out what impact drag
pipes have on horse power and torque of your Harley-Davidson engine, or an experienced drag racer
looking for the latest cam specifications, the V-Twin Motorcycle Performance Guide has
the technical information you can use.
For interests ranging from motorcycle drag racing, hot
street performance or just getting the best possible performance from your current bike, V-Twin
Motorcycle Performance Guide provides a
reference guide and forum for your interests. This is a source of solid technical
information that you can put to use today. When it comes to engine tuning, changing
carburetors, carburetor re-jetting, picking a camshaft, camshaft installation, dyno
tuning, exhaust systems, cylinder head modifications, performance modifications,
suspension tuning or just routine maintenance, V-Twin Motorcycle Performance Guide has the answers you need.
Information provided in the V-Twin Motorcycle
Performance Guide covers engines made by
Harley-Davidson and its clones. We have included information on the 1340 Evolution engine, Twin Cam
88, Twin Cam 95, Shovelhead 74, Shovelhead 80, Sportster Evolution, Sportster
Ironhead, Sportster XR, and Buell. If you can't find the engine you have listed here, its
to valuable as a museum piece to modify the engine.
Looking for the easy way to increase
the horsepower of your big twin motorcycle? Making Power
step-by-step guide to improve your horsepower and torque.
We have assembled three different
Evolution engine performance packages that can be put together in a weekend.
Build a 64 horsepower Stage 1 bike
Build a 74 horsepower Stage 2 bike
Build a 82 horsepower Stage 3 bike
Build a 95 horsepower Stage 3 bike
Twin Cam engines with fuel injection have become a favorite performance
platform over the past couple of years. Nightrider offers you information
for a variety of upgrade paths.
128HP TwinCam 95CID engine offers high end
100HP Twin Cam 95CID street engine
Confused about your fuel injection
system? We explain how your
Harley-Davidson motorcycle fuel injection system works with our EFI 101
Horsepower Gallery provides a quick list of horsepower obtained by many engine
combinations. The horsepower, engine type, cylinder heads, carburetor, camshaft and frame
type are all listed for reference.
The Drag Strip Gallery showcases some
of the quickest V-Twin Racers around. Compare your times to these racers, or
better yet send your results to us.
The Land Speed Racing Gallery is the ultimate
challenge. Just how fast will a V-Twin engine run. If you thing your bike is
fast, see what can really be done.
Shop Manual is a performance and technical reference manual
for engine modifications. This is where you will find all the motorcycle
modification information. There is a lot of serious v-twin performance
information available for
Manual Appendix section contains contains information of interest to all high performance motorcycle riders.
Here you will find a Shop Manual that provides information on maintenance,
tuning, shop data and troubleshooting your motorcycle.
Ever wonder how the best racers always
seem to know how their motorcycle is going to perform? Lots of experience is
one way, the other is the use of powerful computer tools that predict
performance and tuning information. The selection of motorcycle and automotive
Calculators provide ways to: